One-way valve structure and quantitative pump

Abstract

The invention relates to the technical field of valves, and provides a one-way valve structure and a quantitative pump. The one-way valve structure comprises a valve plate and a valve plate support, the valve plate comprises a mounting portion and a sealing portion, and the sealing portion covers the side wall of the valve plate support; the edge of the sealing portion is attached to the side wallof the valve plate support; compared with a conventional valve, the valve plate and the valve plate support form a coating type sealing, so that the valve plate can be better attached to the valve plate support, and reliability and stability of sealing can be improved. The one-way valve structure is arranged in the quantitative pump so as to control the liquid to flow directionally, so that the sealing is more reliable and more stable, the liquid can be effectively prevented from flowing reversely, and therefore the quantitative precision is achieved; and the valve structure and the quantitative pump solve the problems that in the prior art, the quantitative precision fluctuation is large and the liquid discharge liquid is insufficient are solved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a check valve structure and a quantitative pump. Background technique [0002] Check valves are usually used in hydraulic or pneumatic systems to prevent the reverse flow of oil or compressed air. Generally, the one-way flow of oil or gas is realized by opening or blocking the inlet and outlet of the check valve diaphragm. . Conventional one-way valve diaphragms have poor sealing stability and reliability. For hydraulic systems, the sealing performance of one-way valves is one of the key factors for the normal and accurate operation of hydraulic systems. The accuracy and stability of the liquid volume play a key role. In the prior art, the sealing structure of the quantitative pump includes: (1) the power source needs to cooperate with a specific solenoid valve to play a quantitative role; (2) the valve is directly integrated into the (3) The inlet and outlet are provided with t...

AI Technical Summary

Problems solved by technology

Conventional one-way valve diaphragms have poor sealing stability and reliability. For hydraulic systems, the sealing performance of one-way valves is one of the key factors for the normal and accurate operation of hydraulic systems. The accuracy and stability of the liquid volume play a key role. In the prior art, the sealing structure of the quantitative pump includes: (1) the power source needs to cooperate with a specific solenoid valve to play a quantitative role; (2) the valve is directly integrated into the On the quantitative pump; (3) The inlet and outlet are provided with a traditional one-way valve diaphragm for sealing

Among them, the two schemes (1) and (2) need to cooperate with a specific solenoid valve to work, so they have certain limitations in the applicable field and cost. In scheme (3), the sealing stability of the one-way valve diaphragm and The reliability is poor. When the inlet and outlet liquid level difference is large, it is prone to large fluctuations in quantitative accuracy and insufficient liquid discharge.

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